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UNVENTED (VENT-FREE) GAS FIREPLACE
OWNER'S OPERATION AND INSTALLATION MANUAL
Patent Pending
Shown with optional cabinet mantel and hearth base accessories.
LMFP33NR(A) AND LMFP33PR(A) REMOTE CONTROL
WARNING: If the information in this manual is not fol-
lowed exactly, a fire or explosion may result causing
property damage, personal injury, or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neigh-
bor's phone. Follow the gas supplier's instruc-
tions.
• If you cannot reach your gas supplier, call the fire
department.
— Installation and service must be performed by a quali-
fied installer, service agency, or the gas supplier.
For more information, visit www.desatech.com
GAS FIREPLACE SYSTEMS
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Summary of Contents for Desa LMFP33NR(A)
- Page 1 UNVENTED (VENT-FREE) GAS FIREPLACE OWNER’S OPERATION AND INSTALLATION MANUAL Patent Pending Shown with optional cabinet mantel and hearth base accessories. LMFP33NR(A) AND LMFP33PR(A) REMOTE CONTROL GAS FIREPLACE SYSTEMS WARNING: If the information in this manual is not fol- lowed exactly, a fire or explosion may result causing property damage, personal injury, or loss of life.
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Page 2: Table Of Contents
WARNING: Improper installation, adjustment, altera- tion, service, or maintenance can cause injury or prop- erty damage. Refer to this manual for correct installation and operational procedures. For assistance or addi- tional information consult a qualified installer, service agency, or the gas supplier. WARNING: This is an unvented gas-fired heater. -
Page 3: Safety Information
SAFETY INFORMATION WARNING: This product con- tains and/or generates chemicals known to the State of California to cause cancer or birth defects, or other reproductive harm. IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, op- erate, or service this heater. Improper use of this heater can cause serious injury or death from burns, fire, explosion,... -
Page 4: Control Knob
SAFETY INFORMATION Continued 1. This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases. 2. Do not place propane/LP supply tank(s) in- side any structure. Locate propane/LP supply tank(s) outdoors (propane/LP units only). -
Page 5: Local Codes
LOCAL CODES Install and use fireplace with care. Follow all local codes. In the absence of local codes, use the lat- est edition of The National Fuel Gas Code ANSI Z223.1/NFPA 54*. *Available from: American National Standards Institute, Inc. 1430 Broadway New York, NY 10018 National Fire Protection Association, Inc. -
Page 6: Providing Adequate Ventilation
AIR FOR COMBUSTION AND VENTILATION Continued PROVIDING ADEQUATE VENTILATION The following are excerpts from National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation. All spaces in homes fall into one of the three fol- lowing ventilation classifications: 1. -
Page 7: Combustion And Ventilation Air
AIR FOR COMBUSTION AND VENTILATION Continued Example: Gas water heater Vent-free fireplace Total 4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used. __________Btu/Hr (maximum the space can support) _________Btu/Hr (actual amount of Btu/Hr used) Example: 51,200 Btu/Hr (maximum the space can support) 73,000 Btu/Hr (actual amount of... -
Page 8: Installation
INSTALLATION NOTICE: This heater is intended for use as supplemental heat. Use this heater along with your primary heating system. Do not install this heater as your pri- mary heat source. If you have a central heating system, you may run system’s circulating blower while using heater. - Page 9 Figure 5 - Installing Hood to Firebox Set Screws Side Brass Adjusting Trim Plate Shim Mitered Edge Slot Figure 6 - Assembling Brass Trim 111604-01H Assembled Brass Trim COMBUSTIBLE MATERIALS 42" Slot www.desatech.com Trim Hanging Screws MINIMUM CLEARANCE TO Left and Bottom Right Sides and Rear...
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Page 10: Conventional Fireplace Installation
INSTALLATION Continued CONVENTIONAL FIREPLACE INSTALLATION Conventional installation of this fireplace involves installing fireplace along with the corner, face, or cabinet mantel with hearth base accessories against a wall in your home. Follow the instructions below to install the fireplace in this manner. Note: The instructions in this section show instal- lation using the cabinet mantel and hearth base accessories. -
Page 11: Built-In Fireplace Installation
INSTALLATION Continued Figure 12 - Inserting Fireplace Into Cabinet Mantel BUILT-IN FIREPLACE INSTALLATION Built-in installation of this fireplace involves installing fireplace into a framed-in enclosure. This makes the front of fireplace flush with wall. If installing a mantel above the fireplace, you must follow the clearances shown in Figure 18, page 13. - Page 12 8. Install gas piping to fireplace location. This installation includes an approved flexible gas line (if allowed by local codes) after the equip- ment shutoff valve. The flexible gas line must be the last item installed on the gas piping. See Installing Gas Piping to Fireplace Location, page 13.
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Page 13: Installing Gas Piping To Fireplace Location
Wall board or facing material (above firebox) may be of combustible material, including decorative mantel ornaments or other similar projec- tions off of the facing material. Firebox Figure 18 - Minimum Mantel Clearances for Built-In Installation INSTALLING GAS PIPING TO FIREPLACE LOCATION WARNING: This appliance requires a 1/2"... - Page 14 INSTALLATION Continued For propane/LP units, the installer must supply an external regulator. The external regulator will reduce incoming gas pressure. You must reduce incoming gas pressure to between 11 and 14 inches of water. If you do not reduce incoming gas pres- sure, heater regulator damage could occur.
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Page 15: Connecting Fireplace To Gas Supply
INSTALLATION Continued CONNECTING FIREPLACE TO GAS SUPPLY Installation Items Needed • 5/16" hex socket wrench or nut-driver • Phillips screwdriver • sealant (resistant to propane/LP gas, not provided) 1. Remove two screws that hold fireplace screen in place for shipping. These screws are located near top of screen. -
Page 16: Checking Gas Connections
INSTALLATION Continued CHECKING GAS CONNECTIONS WARNING: Test all gas pip- ing and connections, internal and external tonit, for leaks after installing or servicing. Correct all leaks at once. WARNING: Never use an open flame to check for a leak. Apply a noncorrosive leak detec- tion fluid to all joints. - Page 17 INSTALLATION Continued Middle Log (#1) Figure 26 - Installing Rear and Middle Logs 111604-01H www.desatech.com...
- Page 18 INSTALLATION Continued Left Top Log (#4) Figure 28 - Installing Top Logs Models LMFP33PRA and LMFP33NRA 1. Place the base of the middle log (#1) in the U-shaped slots of the grate base. The cutout on the right of the middle log should fit over the burner (see Figure 29).
- Page 19 4 AA Batteries Battery Housing Backup Switch Figure 33 - Installing Batteries in Receiver 111604-01H Slot Cover Receiver www.desatech.com...
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Page 20: Operating Heater
OPERATING HEATER Continued LIGHTING INSTRUCTIONS WARNING • If fireplace has glass doors, never operate this heater with glass doors closed. If you op- erate heater with doors closed, heat buildup inside fireplace will cause glass to burst. Make sure there are no obstructions across opening of fireplace. - Page 21 OPERATING HEATER Continued Pilot Burner Figure 36 - Pilot (Propane/LP) Pilot Burner Figure 37 - Pilot (Natural) 111604-01H Ignitor Electrode Ignitor Electrode www.desatech.com...
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Page 22: Inspecting Burners
OPERATING HEATER Continued Setting Room Temperature Press the up or down key until the small triangle is to the left of the thermometer icon (see Figure 38, page 21). Press the left or right key to set the desired room temperature. Setting Timer (Sleep Function) Press the up or down key until the small triangle is to the left of the clock icon (see Figure 38, page... -
Page 23: Main Burner
INSPECTING BURNERS Continued BURNER PRIMARY AIR HOLES Air is drawn into the burner through the holes in the fitting at the burner entrance. These holes may become blocked with dust or lint. Periodically inspect these holes for any blockage and clean if needed. - Page 24 1. Shut off the unit, including the pilot. Allow the unit to cool for at least thirty minutes. 2. Inspect burner, pilot, and primary air inlet holes on injector holder for dust and dirt (see Figures 43 and 44). 3. Blow air through the ports/slots and holes in the burner.
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Page 25: Troubleshooting
WARNING: Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater. CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/pilot unit. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM When ignitor button is pressed, there is no spark at ODS/pilot... - Page 26 OBSERVED PROBLEM ODS/pilot lights but flame goes out when control knob is released Burner does not light after ODS/pilot is lit Delayed ignition of one or both burners Burner backfiring during com- bustion Slight smoke or odor during initial operation TROUBLESHOOTING Continued POSSIBLE CAUSE...
- Page 27 OBSERVED PROBLEM Moisture/condensation noticed on windows Heater produces a whistling noise when burners are lit White powder residue forming within burner box or on adjacent walls or furniture Remote does not function Fireplace produces a clicking/ ticking noise just after burner is lit or shut off 111604-01H TROUBLESHOOTING...
- Page 28 WARNING: If you smell gas • Shut off gas supply. • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Fol- low the gas supplier’s instructions.
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Page 29: Specifications
If so, contact DESA Heating Productsʼ Technical Service Department at 1-866-672-6040. When calling, please have your model and serial numbers of your heater ready. You can also visit DESA Heating Productsʼ techni- cal services web site at 111604-01H SPECIFICATIONS... -
Page 30: Illustrated Parts Breakdown And Parts List
ILLUSTRATED PARTS BREAKDOWN MODELS LMFP33PR, LMFP33PRA, LMFP33NR AND LMFP33NRA (SHOWN) “A Models” www.desatech.com 111604-01H... -
Page 31: Parts List
This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions listed under Replacement Parts on page 29 of this manual. LMFP33PR LMFP33PRA LMFP33NR 111625-03 109072-01 111625-04 109073-01 111625-01 109074-01 111625-05 109075-01 ____ 111625-07 103778-01 103778-01 098249-01 098249-01 099387-09... - Page 32 ILLUSTRATED PARTS BREAKDOWN FIREBOX LMFP33PR, LMFP33PRA, LMFP33NR AND LMFP33NRA www.desatech.com 111604-01H...
- Page 33 FIREBOX LMFP33PR, LMFP33PRA, LMFP33NR AND LMFP33NRA This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions listed under Replacement Parts on page 29 of this manual. PART NUMBER 101357-01 098304-01 104239-01CK 101712-03 099230-02 101346-01 101514-01 M11084-26 104237-01CK 101727-02...
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Page 34: Accessories
Purchase these fireplace accessories from your lo- cal dealer. If they can not supply these accessories, call DESA Heating Productsʼ Sales Department at 1-866-672-6040 for information. You can also write to the address listed on the back page of this manual. - Page 35 NOTES ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ 111604-01H www.desatech.com...
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Page 36: Warranty Information
This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Heating Products Authorized Service Center. Warranty part(s) MUST be obtained through authorized dealers of this product and/or DESA Heating Products who will provide original factory replacement parts.
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